EP2776611A1 - Compartiment anodique pour cellules d'extraction électrolytique de métaux - Google Patents

Compartiment anodique pour cellules d'extraction électrolytique de métaux

Info

Publication number
EP2776611A1
EP2776611A1 EP12780713.9A EP12780713A EP2776611A1 EP 2776611 A1 EP2776611 A1 EP 2776611A1 EP 12780713 A EP12780713 A EP 12780713A EP 2776611 A1 EP2776611 A1 EP 2776611A1
Authority
EP
European Patent Office
Prior art keywords
anodic compartment
anode
frame
skeleton
valve metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12780713.9A
Other languages
German (de)
English (en)
Other versions
EP2776611B1 (fr
Inventor
Giuseppe Faita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie de Nora SpA
Original Assignee
Industrie de Nora SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrie de Nora SpA filed Critical Industrie de Nora SpA
Priority to PL12780713T priority Critical patent/PL2776611T3/pl
Publication of EP2776611A1 publication Critical patent/EP2776611A1/fr
Application granted granted Critical
Publication of EP2776611B1 publication Critical patent/EP2776611B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/04—Diaphragms; Spacing elements

Definitions

  • the invention relates to an anodic compartment of a cell for metal electrowinning equipped with an anode consisting of a metal substrate provided with a coating comprising a catalytic layer.
  • the anodic compartment is designed for containing oxygen bubbles generated by the anodic reaction on the surface of the anode.
  • Electrowinning processes are generally carried out in undivided electrochemical cells containing an electrolytic bath and a multiplicity of anodes and cathodes; in such processes, such as for instance copper electrodeposition, the electrochemical reaction taking place at the cathode, generally made of stainless steel, leads to the deposition of copper in metallic form on the cathode itself.
  • the anode generally made of lead, as the result of the electrochemical reaction gaseous oxygen is produced, which is detached from the electrode surface in form of bubbles migrating toward the electrolyte surface. Once they reach the free surface of the electrolyte, bubbles break giving rise to an acidic mist (aerosol), fundamentally consisting of acid electrolyte droplets suspended in the atmosphere overlying the electrolytic bath.
  • Acid mists besides being noxious for the health of people working in the surrounding environment, are corrosive and dangerous for all metal parts of the cell room and may damage the instrumentation present.
  • Several chemical and physical techniques are known and used for controlling the concentration of acid mists released in the environment surrounding metal electrodeposition cells; these include the employment of surfactants and mechanical methods such as for instance the use of layers of beads floating on the electrolyte surface, which force the gas bubbles along a tortuous path where separation of acid mists takes place.
  • the invention relates to an anodic compartment of a metal electrowinning cell delimited by a frame-shaped skeleton comprising one anode obtained starting from a valve metal substrate coated with at least one corrosion-resistant catalytic layer, said anode being inserted inside an envelope consisting of a permeable separator, said permeable separator being secured to said frame-shaped skeleton by means of a an also frame-shaped flange, a demister being located above the anode and delimited by said permeable separator and said skeleton.
  • a configuration of such kind has the advantage of keeping microbubbles confined in an enclosed space.
  • the frame-shaped skeleton for securing the permeable separator may be of plastic material, for instance being formed by four straight segments fixed at the extremities.
  • the flange element for securing the permeable separator to the frame can also be of plastic material and fixed for instance by bolting.
  • anodic compartment as used herein is meant a structure which is applied for each anode present in the electrodeposition cell, optionally to replace a pre-existing lead anode.
  • the anodic compartment comprises an anode with a mechanical structure consisting of an expanded mesh, a punched sheet or a planar sheet.
  • the anodic compartment comprises an anode having a mechanical structure consisting of a pair of expanded meshes or punched sheets arranged in parallel and facing each other.
  • the latter solution providing an anode subdivided into two parallel facing elements can have the advantage of minimising the ohmic drop and homogenising current distribution.
  • the anodic compartment according to the invention comprises an anode having a single or double mechanical structure wherein the valve metal of the substrate is titanium and at least one catalytic layer applied on the substrate comprises oxides of iridium and of tantalum.
  • the anodic compartment comprises a permeable separator which may consist of a porous sheet or a cation-exchange membrane, for instance of the hydrocarbon type.
  • a permeable separator which may consist of a porous sheet or a cation-exchange membrane, for instance of the hydrocarbon type.
  • the porous separator is a porous sheet
  • the portion of sheet in contact with the gas phase may optionally be provided with an impervious layer in order to prevent the possible leakage of oxygen to the environment.
  • the demister is made of a plastic material or of a layer of expanded plastic foam or of closely packed thin blades.
  • the demister has the purpose of detaining the acidic electrolyte mists drafted by oxygen separated from the liquid phase. After passing across the demister, oxygen is vented to the atmosphere or preferably sent to a manifold connected to an aspirator to further reduce the possible residual acid mist traces preventing inasmuch as possible their release to the external environment.
  • the invention relates to an electrochemical cell for metal electrowinning comprising at least one anodic compartment as above described.
  • the proposed structure is suitable for installation in plants of metal extraction by
  • Figure 1 shows a front view and the corresponding side view of a possible embodiment of an anodic compartment comprising an anode formed by a pair of expanded meshes having two current-collecting bars arranged in their interior.
  • Figure 1 shows a front view and the corresponding side view of one embodiment of the anodic compartment delimited by a plastic skeleton 2, a securing flange 3 whereto a porous separator 4 is fixed, an anode formed by a pair of parallel expanded meshes facing each other 5, a lining 6 directed to prevent the leakage of oxygen to the external environment, gaskets 7, a demister 8, current-collecting bars 9 and oxygen outlet nozzle 1.
  • FIG. 1 An anodic compartment as shown in figure 1 was assembled in a lab experimental cell.
  • the cell comprised two 100 cm tall and 70 cm wide stainless steel cathodes with an anodic
  • anodic compartment comprising an anode obtained starting from a substrate consisting of a pair of 70x70 cm parallel expanded meshes facing each other made of titanium, having a tantalum and iridium oxide-based catalytic layer with an overall loading of 9 g/m 2 and a molar ratio Ta:lr of 35:65 referred to the elements.
  • the anodic compartment further comprised two sheets of porous polypropylene hydrophilised with silica powder, equipped in the top part with a thin layer of gas-impervious neoprene, and a demister consisting of an open cell expanded polyurethane body having pores of 100 ⁇ average diameter. Copper was electrowon for 5 hours at constant current density of 700 A m 2 .
  • the electrolyte contained 60 g/l cupric sulphate and 100 g/l sulphuric acid. Acid aerosols
  • a cell was assembled comprising two 100 cm tall and 70 cm wide stainless steel cathodes with an anode placed in-between obtained starting from a substrate consisting of a pair of 70x70 cm parallel expanded meshes facing each other made of titanium, having a tantalum and iridium oxide-based catalytic layer with an overall loading of 9 g/m 2 and a molar ratio Ta:lr of 35:65 referred to the elements. Copper was electrowon for 5 hours at constant current density of 700 A/m 2 .
  • the electrolyte contained 60 g/l cupric sulphate and 100 g/l sulphuric acid.
  • Three layers of hollow polypropylene beads with a diameter of 19 mm were placed on the exposed surface of the electrolyte. Acid aerosols characterisations were carried out at an approximate height of 40 cm above the cell level on the whole perimeter for a time of 45 minutes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

La présente invention concerne un compartiment anodique pour cellules d'extraction électrolytique de métaux délimité par un squelette en forme de cadre comprenant une enveloppe comprenant un séparateur perméable fixé audit squelette en forme de cadre au moyen d'une bride en forme de cadre, au moins une anode obtenue à partir d'un substrat de métal de soupape revêtu avec au moins une couche catalytique résistante à la corrosion, ladite anode étant insérée à l'intérieur de ladite enveloppe, et un débrumiseur situé au-dessus de ladite anode et délimité par ledit séparateur et ledit squelette. L'invention concerne en outre une cellule électrochimique pour l'extraction électrolytique de métal comprenant au moins un tel compartiment anodique.
EP12780713.9A 2011-10-26 2012-10-25 Compartiment anodique pour cellules d'extraction électrolytique de métaux Active EP2776611B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12780713T PL2776611T3 (pl) 2011-10-26 2012-10-25 Komora anodowa do elektrolizerów do otrzymywania metali

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001938A ITMI20111938A1 (it) 2011-10-26 2011-10-26 Comparto anodico per celle per estrazione elettrolitica di metalli
PCT/EP2012/071172 WO2013060786A1 (fr) 2011-10-26 2012-10-25 Compartiment anodique pour cellules d'extraction électrolytique de métaux

Publications (2)

Publication Number Publication Date
EP2776611A1 true EP2776611A1 (fr) 2014-09-17
EP2776611B1 EP2776611B1 (fr) 2015-10-07

Family

ID=45315882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12780713.9A Active EP2776611B1 (fr) 2011-10-26 2012-10-25 Compartiment anodique pour cellules d'extraction électrolytique de métaux

Country Status (19)

Country Link
US (1) US9206517B2 (fr)
EP (1) EP2776611B1 (fr)
JP (1) JP6113178B2 (fr)
KR (1) KR101947369B1 (fr)
CN (1) CN103890238B (fr)
AR (1) AR088479A1 (fr)
AU (1) AU2012330375B2 (fr)
BR (1) BR112014009801B1 (fr)
CA (1) CA2847819C (fr)
CL (1) CL2014001071A1 (fr)
EA (1) EA025814B1 (fr)
ES (1) ES2556039T3 (fr)
IT (1) ITMI20111938A1 (fr)
MX (1) MX346758B (fr)
PE (1) PE20142085A1 (fr)
PL (1) PL2776611T3 (fr)
TW (1) TWI563127B (fr)
WO (1) WO2013060786A1 (fr)
ZA (1) ZA201401934B (fr)

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* Cited by examiner, † Cited by third party
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ITMI20130505A1 (it) * 2013-04-04 2014-10-05 Industrie De Nora Spa Cella per estrazione elettrolitica di metalli
TWI655324B (zh) * 2014-02-19 2019-04-01 義大利商第諾拉工業公司 電解槽之陽極結構以及金屬電解場中金屬澱積方法和系統
CN105018972A (zh) * 2014-04-21 2015-11-04 上海奇谋能源技术开发有限公司 一种降低电解槽电压的方法
CL2014001133A1 (es) * 2014-04-30 2014-11-03 Propipe Maqunarias Limitada Dispositivo electródico insertable (dei) que reemplaza al ánodo tradicional en procesos de electro obtencion de metales, que no genera neblina ácida u otros gases, que comprende un marco perimetral dispuesto en ambos lados del dispositivo, membranas de intercambio ionico, electrodo estrategico que es un conductor o semiconductor, ducto de entrada y salida, barras conductoras electricas verticales; procedimiento de aplicacion del dispositivo.
TWI687550B (zh) * 2014-08-01 2020-03-11 義大利商第諾拉工業公司 金屬電煉電解槽之單位電池及其陽極元件，和從電解浴初步萃取金屬用之電解槽，以及從含亞銅離子和／或銅離子之溶液取得銅之製法
ITUB20152450A1 (it) * 2015-07-24 2017-01-24 Industrie De Nora Spa Apparato elettrodico per elettrodeposizione di metalli non ferrosi
CN107208291B (zh) 2015-11-25 2021-03-19 普罗特股份有限公司 用于电解沉积或电解精炼的ews模块器件及其操作过程
ES2580552B1 (es) * 2016-04-29 2017-05-31 Industrie De Nora S.P.A. Ánodo seguro para celda electroquímica.
ES2818224B2 (es) 2019-10-07 2021-11-16 Pueo Felix Prado Instalacion de electro-deposicion con barras inter-celda activas

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JPS51117904A (en) * 1975-04-10 1976-10-16 Mitsui Mining & Smelting Co Ltd A method for collecting gas generated in metal winning by the wet elec trolytic process
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CA1092056A (fr) * 1977-10-11 1980-12-23 Victor A. Ettel Cellule d'extraction par voie electrolytique, avec anode sous enveloppe poreuse
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Also Published As

Publication number Publication date
CN103890238B (zh) 2017-05-10
AR088479A1 (es) 2014-06-11
ITMI20111938A1 (it) 2013-04-27
CA2847819A1 (fr) 2013-05-02
EA201400330A1 (ru) 2014-07-30
AU2012330375A1 (en) 2014-03-27
PE20142085A1 (es) 2015-01-10
EP2776611B1 (fr) 2015-10-07
CN103890238A (zh) 2014-06-25
PL2776611T3 (pl) 2016-03-31
BR112014009801B1 (pt) 2020-08-11
CL2014001071A1 (es) 2014-07-11
US9206517B2 (en) 2015-12-08
US20140246306A1 (en) 2014-09-04
ZA201401934B (en) 2016-01-27
EA025814B1 (ru) 2017-01-30
WO2013060786A1 (fr) 2013-05-02
JP6113178B2 (ja) 2017-04-12
KR20140082788A (ko) 2014-07-02
BR112014009801A2 (pt) 2017-04-18
JP2014530961A (ja) 2014-11-20
TWI563127B (en) 2016-12-21
MX2014004999A (es) 2014-10-17
TW201317398A (zh) 2013-05-01
MX346758B (es) 2017-03-31
CA2847819C (fr) 2019-07-16
AU2012330375B2 (en) 2016-10-13
ES2556039T3 (es) 2016-01-12
KR101947369B1 (ko) 2019-04-22

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